Submission #129854

#	Time	Username	Problem	Language	Result	Execution time	Memory
129854		miguel	Combo (IOI18_combo)	C++14	5 / 100	1 ms	200 KiB

combo

#include<bits/stdc++.h>
#include <combo.h>
using namespace std;
#define rc(x) return cout<<x<<endl,0
#define pb push_back
#define dbg(x) cout << #x << '=' << x << '\n';
#define ll long long
#define sz size()
#define x first
#define y second
#define pi pair <int, int>
#define pii pair <int, pi>
#define vi vector <int>
const ll mod = 1e9 + 7;
int n;
 
 
string guess_sequence(int n){
    string s="";
    vector <string> ch={"A", "B", "X", "Y"};
    if(press("A")) s="A";
    else if(press("B")) s="B";
    else if(press("X")) s="X";
    else s="Y";
    vector <string> use;
    for(int i=0; i<=3; i++) if(ch[i]!=s) use.pb(ch[i]);
    for(int i=1; i<n-1; i++){
        string xd=s+use[0]+s+use[1]+use[0]+s+use[1]+use[1]+s+use[1]+use[2];
        int q=press(xd);
        if(q==i) s=s+use[2];
        else if(q==i+1) s=s+use[0];
        else s=s+use[1];
    }
    int q=press(s+use[0]+s+use[1]);
    if(q==n-1){
        return (s+use[2]);
    }
    else{
        q=press(s+use[0]);
        if(q==n-1) return (s+use[1]);
        else return (s+use[0]);
    }
}

• Subtask 1: 5 / 5
• Subtask 2: 0 / 95